Draw chuck attachment



Filed Feb. 24.

L. w. MNDIEWSON DRAW CHUCK ATTACHMENT llmetenteiil .ittpit ftd,

titl

ri llilimll .llnplicaton filed February 24.*, 1.921.

Be it known that ll, Leonel-:D l-ll. linnenw son, citizen ot' the lllnited tttates, residing at Bridgeport, in the county ot lliziirlield and State ot 4lonnecticut, have invented certain new and useful llinprovenients in Drew Chuck Vlittacliineuts; ind ll do lierehy declare the 'Following' to he a tull, clear, and eik-act description oit the invention, such as will enahle others skilled in the art to Lwhich it iii'ipertains to inake and `use the seine.

'lhis invention relates to draw chuck attachments, adapted 'i'or use in connection `with rotatable spindles find arhors ot various machines. rllhechuck or collet alluded to is e tool in connnon use having' a central here tor the reception ot sinallnforkingg,l tools, and is split in part 'to give a .fi-spring,I ellect so that, when its taper head is drawn into a correspondingly tapered seat, the split end olf the chuck Will lirinlv close ahout a tool mounted therein. The ohjectot' the present .invention is to provide novel ineens tor actuating' the chuck to open and close Atroni the iront rathinf than troni the rear.

lleierrinn' to the accompanying' drawings wherein the tin'ures and letters oli reference indicate like parts throunl'iout the severel views:

Figure 1 represents a broken sectional 'View oit a rotatable spindle with the chuck attochment mounted therein;

llipjurc Q is a front elevation ot Figure 1;

Figure fi is a detail broken sectional vienT ol? the socket 'teature olf' the chuck attachinent;

lthe rotative action ol" the chuck holding;

uienfiher fl represents a` taper socket or other like holder adapted to he insertt-id in the spindle which noav represent the rotntehle center ot various machines, such, `tor instance an lathes, milling?, machines, ttc. ln lligure 4l: is shown a shell or other like rneinher havingn the straight cylindrical body 3 edetpted torotiiteloly tit he recess or open mouth Serial. No. till/1131.

lrimriiin` et ot the socket, and. the beveled portion o adapted to register with -its teper seat G.

.lhe chuck hes the hody portion 'l' adapted to registi-n with the here 8 of the shell, and its taper head 9 with the tapered mouth 10 ot' said shell. l`lie chuck has the opening 1l therethrough, sind the kerts 12 to f rive it a z-iinf'ii eilfect, and the threaded end 13 :ulaijited to register with the teinale thread 1,41: oit the socket i rl"he shell is provided with the key .l5 projecting into the loore 8 adapted to register with the keywajv 16 of the chuck, seen more clearly in Figure G.

lhe chuck and shell may he assembled to- @other he'lfore they ere inserted Within the socket, or the shell nnty rst he seated and the chuck may he entered, Figure 7, until its three ded end is in position to engage the threads 1li ol the socket and also With its kevwav registering with the ket7 of the shell. Then the shell is rotated, hy ineens ot its lniurled heald 1l', to engage the threads 13 and lfland thus cause the chuck to loe dreivn i u until 'hilly seated in the shell, as shown in lTniui-e Il,u llllhen the chuck is thus seated, a very1 elicflit rotetion oit the shell will drew the chuck inv/'e 'diy and compress the spring end oi the chuck to grip the cutting tool 18 temporarily inserted therein. rlllie taper niouth G ot' the socket and the incline 5 of the shell form e, locating,l seat or joint which Will always preserre the central position of the shell and chuck with respect to the anis ol" the socket, so that said shell. sind chuck will alivztys run true, a result not to he ohtained were the inner 'face ot the head 17 elzinfiped against the outer end of the socket.

Une ot the advantages oit locating the adjusting; licature o'l the chuck at the outer en d. ot the socket is that the chuck nia-jv also hc utilized Ator holding1 rods ot an;T lei'ln'th, which rods can entend throupgh the central hore 19 ot the spindle 2 and the hore 9H ot the holder or socket 1,

'llhe iittacliinent rcoi'iires no special viorin of chuck hut is ndapted to Well known chuck constructions in common use.

lllavinyr thi s descrihed inv invention 'what l claiin is it dravv chuck. attachment comprisin,er a tapered socket meinher adapted to he inserted in the tapered mouth ot a rotating;r spindle, said socket inemher having; e, recessed niouth to torno hearing and a reduced threaded opening` entendit@l inwardly there till chuck mounted in the shell having a threaded end engaging the threaded opening of the Boeket anda tapered headcooperating 10 with said flared mouth, and means for rotatably connecting the ohuek with the shell. In testimony whereof I affix my signature.

LEONARD H. ANDERSON. 

